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Transport without Charge

The observations of quantized steps in electric conductance have provided important insights into the physics of mesoscopic systems and allowed for the development of quantum electronic devices. Whilst quantized conductance should not rely on the presence of electric charges, it had not been observed for neutral, massive particles. I will report on recent experiments in which we observed quantized conductance in the transport of neutral atoms [1]. We used high-resolution imaging to shape the potential of a quantum point contact and a quantum wire between two reservoirs of quantum degenerate fermionic lithium atoms. I will further report on recent findings in spin and particle conductance measurements through a quantum point contact in a regime of strong atom-atom interactions [2].

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Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...

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About JQI

The Joint Quantum Institute is a research partnership between University of Maryland (UMD) and the National Institute of Standards and Technology, with the support and participation of the Laboratory for Physical Sciences.

Created in 2006 to pursue theoretical and experimental studies of quantum physics in the context of information science and technology, JQI is located on UMD's College Park campus.